IMHO putting such a large grip as described on a j-frame seems counter-productive.
If we wanted it to serve as a rabbit's foot, I would put smooth wood varnished magna grips on it and be done.
I don't shoot it very well with the rubber Hogue bantam grip and my wife doesn't shoot it well with the smooth wooden banana/three-finger grips that I like. My complaint is that I can't get a pinky on it, so it twists so much my thumb gets chewed by the cylinder release. Hers is that the backstrap smashes into her hand and that she can't get a good grip on the smooth wood.
She likes the revolver otherwise, so we're working on a solution because she won't train with it as is and she won't carry until she feels competent/confident in her abilities with it. My goal is to get the wife to this point, which is great in of itself and gives me leverage to get a new pistol for myself once she takes "my" carry gun. Work with me, people.
So this takes us to the original question.
I should have pointed the question better at the various Pachmayr models to see if anyone had a recommendation for something to compare against the Hogue Monogrip (which does cover the backstrap) that would serve to dampen recoil, cover the backstrap, and allow a pinky without looking like the grip belongs on a .500 S&W.